HDMI is a badly designed interface developed for the purpose of controlling content not a superior signal. Since control could not be done with analog connections, HDMI was a new digital alternative to allow whoever wanted to control the content with HDCP.

Problems with HDMI are not usually with the cable but is in the HDCP copy-protection protocol. There was a technical paper from the HDCP group pointing out that some developers of switches are making incorrect assumptions about the way to handle HDMI/HDCP standards.

HDMI is being pushed because of the copy protection. High-bandwidth Digital Content Protection (HDCP) is a form of Digital Rights Management (DRM) developed by Intel Corporation to control digital audio and video content as it travels across Digital Visual Interface (DVI) or High-Definition Multimedia Interface (HDMI) connections. The specification is proprietary, and creating an implementation of HDCP requires a license.

HDCP is licensed by Digital Content Protection, a subsidiary of Intel. In addition to paying fees, licensees agree to limit the capabilities of their products. For example, high-definition digital video content must be restricted to DVD quality on non-HDCP compliant video outputs when requested by the source. DVD-Audio content is restricted to DAT quality on non-HDCP digital audio outputs (analog audio outputs have no quality limits). Licensees cannot allow their devices to make copies of content, and must design their products in ways that effectively frustrate attempts to defeat the content protection requirements

I'm having trouble with the kanex XD vs2. with my mid 2012 macbookpro connecting with a male HDMI cable to my HD Vizio. Im able to connect for like, 5 min, then i get a maroon/red screen on the mac and a blue screen on the TV. what's going on? is there a way to fix it? or am i doing something wrong. the audio/display looks great when it works.

question... i dont quite know how to use this blog.... that said.2010 MAC air mini port to hdmi in 2nd screan (LG TV) does not work. get the blue screan indicating reconition of something being pluged into the mini port but not reaction on the tv.

Did a shutdown restart and got the same result although it did give the option to mirrior and did not work... should i just go back to VGA stule conector and give up on HDMI?

A potential solution to the external display not receiving signal problem is unplug the HDMI cable from either end while both computer and monitor are on, then shut down the computer and unplug the power cord. Reconnect the HDMI cable then the power cord, start up the computer and the external display should work. Throughout the whole process the external display should remain on. People who also have Windows installed through Boot Camp may try getting it to work in Windows first. Once it did, boot back in OS X and it should work too.

To prevent the same issue in the future, choose the resolution that's below the highest supported mode. Use 1080i instead of 1080p or 720p instead of 1080i for example. The Refresh Rate doesn't seem to matter however.

I have a MacBook and for the second time trying to connect a belkin hdmi USB adapter to my TV it doesn't recognize it. I also have verizon fios cable box and once I connect the hdmi to computer the cable box ends up not working. Anyone else with this issue?

I am having similar problems, my cable is plugged into my computer and TV, it goes blue as though it is going to work and but then nothing happens. I go into my System preferences and go to Displays and it doesn't show that the cable is there? Even though the screen went blue like it was registering it?

Cable worked not that long ago? Is this a MAC software problem? Cos I can't find anything that works Someone PLEASE help me. or MAC please correct the software cos it worked perfectly before.

I am having similar problems, my cable is plugged into my computer and TV, it goes blue as though it is going to work and but then nothing happens. I go into my System preferences and go to Displays and it doesn't show that the cable is there? Even though the screen went blue like it was registering it?

Holy bells, that actually worked (leaving the adapter plugged into the laptop, turning on the tv, and then plugging the HDMI cable from the tv to the apapter in the laptop). I didn't expect it to work, but it did.

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